i have client need to install RAC on standard edition DB and from search i found :

( Note that when used with Oracle Real Application Clusters in a clustered server environment,Oracle Database Standard Edition requires the use of Oracle Clusterware. Third-party clusterwaremanagement solutions are not supported. Automatic Storage Management (ASM) must be used tomanage all database-related files. Third-party volume managers and file systems are not supportedfor this purpose. When used with Oracle Real Application Clusters, Oracle Advanced SecuritySSL/TLS is included )